Car truck



I Jan. 27. 1925.

H. M. PFLAGER v CAR TRUCK Filed March 4, 1924 5 f Z Z W 1 f g 7 5 m Ffl n Hr J 3 W 4 F F a 6 ,F 4 M a;

Patented Jan. 2'2, 192%.

, SATE HARRY M. PFLAGER, Q'F 5'1. LOUIS, MISSOURI, AS$IGNOR T0 COMMONWEALTH STEEL COMPANY, QF ST. LOUIS, MISSUURI, A GORIPQRATION OF NEW JERSEY.

CAR TRUCK.

Application filed March 4, 1924. Serial No. 696,745.

To all whom it may concern:

Be it known that I, HARRY M. PFLAGER, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Car Trucks, of which the following is a specification, such as will enable others skilled in the. art to which it appertains to make and use the same. v

My invention relates to railway car trucks and consists in an improved cross bolster and center bolster assembly in six wheel trucks. I

The object of my invention is to prevent relative movement of the cross bolsters and i center bolster in the event of collision or any other abnormal shock which must" be absorbed by these members. In the eventof such a shock, the center bolster may attempt to shift horizontally or to rise off of the truck, and I desire to guard against either of these movements.

Preferably tie anti-shifting elements are formed integral upon the bolsters so as to minimize size and cost and eliminate loose play or failure such as is likely to result from riveted or bolted connections.

In the accompanying drawings which il-I lustrate my invention Figure 1 is a top view of a six wheel truck to which my invention is applied in a preferred form.

Figure 2 is a vertical side elevation of the truck sectioned in part. to more clearly{illustrate the invention.

Figures 3 and 4 are detailed sections corresponding to. the sectioned ortions of Figure 2 and illustrating modifications of my invention.

Figure 5 is a similar detail section ofthe preferred construction.

The truck includes the usual wheels 1, axles 2, journal boxes 3, equalizers 4, ame 5 supported on the equalizers through springs 6, and a spring plank 7 swung from the frame by links 8. Spaced-cross'bolsters 9 are carried by the frame through springs '10, 'springplank 7 and links 8. A center bolster 11*is mountedcupon cross bolsters 9 and comprises a center late support. or- .tipn-.l2 'and liorizontal egs 13 ez'zten ing from =the center plate portion outwardly and over the cross bolstersf --jly of the truck as well as To more securely hold the centerbolster and cross bolsters in assembled position, these members are provided with interengaging elements adapted to resist displacement of the members in the event of collision or other shock. In the preferred form illustrated in Figures 1 and 2, these elements take the form' of angular flanges or lugs 14 on cross bolsters 9 and horizontal flanges or lugs 15 formed on thefeet of legs 13. Each of the flanges 14 extends longitudinall of its respective cross bolster for a ,reliitively short distance and extends upwardly and inwardly toward the other flange. These flanges are arranged in pairs, as illustrated, and cooperate to form an inverted T-slot or recess in which the horizontal flanges 15 on the center bolster may be slid by movement of the center bolster transversely of the truck and longitudinally of the cross bolsters. After being so assembled, the arts are retained against reverse disassem ly movement by means of bolts 19.

Obviously, this construction of the cross ,bolster and center bolsters rovides interengaging elements which e ectively resist an relative movement of the bolsters longitu inally of the truck or vertically of the truck.

In the modified construction shown in which may be recessed as indicated so as to I afford engagement with In s 20 transverse- Iongitudinally of the truck. In each of these modified constructions, the bolster will be connected by bolts corresponding to bolts 19 and while these bolts'will be suflicient to resist ordinary shifting stresses, they will not be called upon to resist extraordinary stresses resulting from abnormal conditions.

hall of these constructions, I prefer to form the interengaging elements into ally with their respective bolsters, but the road otherwise provided on the bolsters.

' idea may be embodied in suitable elements Other modifications in my invention may be made without departing from the scope thereof as expressed in the following claims.

I claim:

1. In a car truck including a frame, cross bolsters carried by said frame, the tops of each of said cross bolsters being provided between its sides with vertical surfaces facing each other and extending transversely of the truck, a center bolster supported on said cross bolsters, and projections on said center. bolster each extending downwardly between a pair of said opposing cross bolster surfaces.

2. In a car truck including a truck frame, spaced cross bolsters carried by said. frame, a removable center bolster supported on said cross bolsters, and interengaging elements integral with said cross bolsters and center bolster respectively to prevent relative movement thereof vertically of the truck.

' 3. In a car truck including a truck frame, spaced cross bolsters carried by said frame and provided on their upper surfaces with undercut flanges extending transversely of the truck, and a center bolster carried by said crossbolsters and provided with integral projections extending into said recesses to prevent shifting of said center bolster longitudinally or vertically of the truck. I

fl. In a car truck including a truck frame, spaced cross bolsters carried by said frame, each provided with spaced recesses inits upper face, a removable center bolster comprising a center plate and legs extending horizontally from said center plate over said cross bolsters and terminating in integral projections insertable into said recesses in one horizontal direction and held thereby against movement in other horizontal directions and in vertical directions andremovable means preventing reverse movement of said projections along the line of their insertion.

5. In a car truck includin a truck frame,

spaced cross bolsters carrie' by said frame, each provided on its upper face with an inverted T-slot of restricted len th, a center bolster comprising a center p ate and extensions each terminating in horizontal flanges adapted to be inserted laterally into one of said slots to be held against vertical and lon itudinal movement relative to said cross bolsters.

6. In a car truck including a truck frame, spaced cross bolsters carried by said frame, each provided on its upper face with an inverte T-slot of restricted length, a center bolster comprising a center plate and extensions each terminating in horizontal flanges adapted to be inserted laterally into one of said slots to be held againstvertical and longitudinal movement relative to said cross bolsters, and removable means preventing transverse movement of said cross bolster.

7. In a one-piece cast truck bolster havin a horizontal top surface, integral angu ar flanges extending longitudinally of said bolster for a relatively short distance.

and extending upwardly therefrom and toward each other, the space between said flanges being open at the ends thereof to permit the lateral insertion of a flange engaging member between said flanges.

8. In a one-piece truck center bolster, a center plate having horizontal legs extending therefrom to support said center plate from truck cross bolsters, each of said legs terminating in a downwardly: extending portion provided with horizontal flanges extending from said portion toward and away from the centerplate.

9. In a one-piece truck center bolster, a center plate having horizontal legs extending therefrom to support said center plate from truck cross bolsters, each of said legs terminating in a downwardly extending portion of I-shaped cross section, and a horizontal projection on each I-flange at the end of the latter and extending forwardly and rearwa-rdly of the I-web beyond the L flanges.

In testimony whereof I hereunto affix my signature this 23 day of February, 1924.

H. M. PFLAGER. 

